Exemplo n.º 1
0
Arquivo: cli.c Projeto: 4pao/openwrt
static nvram_handle_t * nvram_open_staging(void)
{
	if( nvram_find_staging() != NULL || nvram_to_staging() == 0 )
		return nvram_open(NVRAM_STAGING, NVRAM_RW);

	return NULL;
}
Exemplo n.º 2
0
int env_save(void)
{
    int size;
    unsigned char *buffer;
    unsigned char *buffer_end;
    unsigned char *ptr;
    queue_t *qb;
    cfe_envvar_t *env;
    int namelen;
    int valuelen;
    int flg;

    flg = nvram_open();
    if (flg < 0) return flg;

    nvram_erase();

    size = nvram_getsize();
    buffer = KMALLOC(size,0);

    if (buffer == NULL) return CFE_ERR_NOMEM;

    buffer_end = buffer + size;

    ptr = buffer;

    for (qb = env_envvars.q_next; qb != &env_envvars; qb = qb->q_next) {
	env = (cfe_envvar_t *) qb;

	if (env->flags & (ENV_FLG_BUILTIN)) continue;

	namelen = strlen(env->name);
	valuelen = strlen(env->value);

	if ((ptr + 2 + namelen + valuelen + 1 + 1 + 1) > buffer_end) break;

	*ptr++ = ENV_TLV_TYPE_ENV;		/* TLV record type */
	*ptr++ = (namelen + valuelen + 1 + 1);	/* TLV record length */

	*ptr++ = (unsigned char)env->flags;
	memcpy(ptr,env->name,namelen);		/* TLV record data */
	ptr += namelen;
	*ptr++ = '=';
	memcpy(ptr,env->value,valuelen);
	ptr += valuelen;

	}

    *ptr++ = ENV_TLV_TYPE_END;

    size = nvram_write(buffer,0,ptr-buffer);

    KFREE(buffer);

    nvram_close();

    return (size == (ptr-buffer)) ? 0 : CFE_ERR_IOERR;
}
Exemplo n.º 3
0
Arquivo: cli.c Projeto: 4pao/openwrt
static nvram_handle_t * nvram_open_rdonly(void)
{
	const char *file = nvram_find_staging();

	if( file == NULL )
		file = nvram_find_mtd();

	if( file != NULL )
		return nvram_open(file, NVRAM_RO);

	return NULL;
}
Exemplo n.º 4
0
int env_load(void)
{
    int size;
    unsigned char *buffer;
    unsigned char *ptr;
    unsigned char *envval;
    unsigned int reclen;
    unsigned int rectype;
    int offset;
    int flg;
    int retval = -1;
    char valuestr[256];

    /*
     * If in 'safe mode', don't read the environment the first time.
     */

    if (cfe_startflags & CFE_INIT_SAFE) {
	cfe_startflags &= ~CFE_INIT_SAFE;
	return 0;
	}

    flg = nvram_open();
    if (flg < 0) return flg;

    size = nvram_getsize();
    buffer = KMALLOC(size,0);

    if (buffer == NULL) return CFE_ERR_NOMEM;

    ptr = buffer;
    offset = 0;

    /* Read the record type and length */
    if (nvram_read(ptr,offset,1) != 1) {
	retval = CFE_ERR_IOERR;
	goto error;
	}

    while ((*ptr != ENV_TLV_TYPE_END)  && (size > 1)) {

	/* Adjust pointer for TLV type */
	rectype = *(ptr);
	offset++;
	size--;

	/* 
	 * Read the length.  It can be either 1 or 2 bytes
	 * depending on the code 
	 */
	if (rectype & ENV_LENGTH_8BITS) {
	    /* Read the record type and length - 8 bits */
	    if (nvram_read(ptr,offset,1) != 1) {
		retval = CFE_ERR_IOERR;
		goto error;
		}
	    reclen = *(ptr);
	    size--;
	    offset++;
	    }
	else {
	    /* Read the record type and length - 16 bits, MSB first */
	    if (nvram_read(ptr,offset,2) != 2) {
		retval = CFE_ERR_IOERR;
		goto error;
		}
	    reclen = (((unsigned int) *(ptr)) << 8) + (unsigned int) *(ptr+1);
	    size -= 2;
	    offset += 2;
	    }

	if (reclen > size) break;	/* should not happen, bad NVRAM */

	switch (rectype) {
	    case ENV_TLV_TYPE_ENV:
		/* Read the TLV data */
		if (nvram_read(ptr,offset,reclen) != reclen) goto error;
		flg = *ptr++;
		envval = (unsigned char *) strnchr(ptr,'=',(reclen-1));
		if (envval) {
		    *envval++ = '\0';
		    memcpy(valuestr,envval,(reclen-1)-(envval-ptr));
		    valuestr[(reclen-1)-(envval-ptr)] = '\0';
		    env_setenv(ptr,valuestr,flg);
		    }
		break;
		
	    default: 
		/* Unknown TLV type, skip it. */
		break;
	    }

	/*
	 * Advance to next TLV 
	 */
		
	size -= (int)reclen;
	offset += reclen;

	/* Read the next record type */
	ptr = buffer;
	if (nvram_read(ptr,offset,1) != 1) goto error;
	}

    retval = 0;		/* success! */

error:
    KFREE(buffer);
    nvram_close();

    return retval;

}
Exemplo n.º 5
0
/*
 * nvram_main()
 *	Endless loop to receive and serve requests
 */
static void
nvram_main()
{
	struct msg msg;
	int x;
	struct file *f;

loop:
	/*
	 * Receive a message, log an error and then keep going
	 */
	x = msg_receive(nvram_port, &msg);
	if (x < 0) {
		syslog(LOG_ERR, "msg_receive");
		goto loop;
	}

	/*
	 * All incoming data should fit in one buffer
	 */
	if (msg.m_nseg > 1) {
		msg_err(msg.m_sender, EINVAL);
		goto loop;
	}

	/*
	 * Categorize by basic message operation
	 */
	f = hash_lookup(filehash, msg.m_sender);
	msg.m_op &= MSG_MASK;
	switch (msg.m_op) {

	case M_CONNECT:		/* New client */
		nvram_new_client(&msg);
		break;

	case M_DISCONNECT:		/* Client done */
		nvram_dead_client(&msg, f);
		break;

	case M_DUP:			/* File handle dup during exec() */
		nvram_dup_client(&msg, f);
		break;

	case M_ABORT:			/* Aborted operation */
		/*
		 * We're synchronous, so presumably the operation is
		 * done and this abort is old news
		 */
		msg_reply(msg.m_sender, &msg);
		break;

	case FS_SEEK:			/* Set position */
		if (!f || (msg.m_arg < 0)) {
			msg_err(msg.m_sender, EINVAL);
			break;
		}
		f->f_pos = msg.m_arg;
		msg.m_arg = msg.m_arg1 = msg.m_nseg = 0;
		msg_reply(msg.m_sender, &msg);
		break;

	case FS_ABSREAD:		/* Set position, then read */
	case FS_ABSWRITE:		/* Set position, then write */
		if (!f || (msg.m_arg1 < 0)) {
			msg_err(msg.m_sender, EINVAL);
			break;
		}
		f->f_pos = msg.m_arg1;
		msg.m_op = (msg.m_op == FS_ABSREAD) ? FS_READ : FS_WRITE;

		/*
		 * Now fall into FS_READ/FS_WRITE 
		 */

	case FS_READ:			/* Read file */
	case FS_WRITE:		/* Write file */
		if (nvram_check_gen(&msg, f)) {
			break;
		}
		nvram_readwrite(&msg, f);
		break;

	case FS_STAT:			/* Get stat of file */
		if (nvram_check_gen(&msg, f)) {
			break;
		}
		nvram_stat(&msg, f);
		break;

	case FS_WSTAT:		/* Writes stats */
		if (nvram_check_gen(&msg, f)) {
			break;
		}
		nvram_wstat(&msg, f);
		break;

	case FS_OPEN:			/* Move from dir down into drive */
		if (!valid_fname(msg.m_buf, x)) {
			msg_err(msg.m_sender, EINVAL);
			break;
		}
		nvram_open(&msg, f);
		break;

	default:			/* Unknown */
		msg_err(msg.m_sender, EINVAL);
		break;
	}
	goto loop;
}